Abstract
A single protective coating on metal is difficult to meet the requirement of anti-corrosion under an aggressive environment. Herein, a two dimensional layer structure of Ti 3 C 2 T x with mercaptosilane composite coating is designed to protect copper from corrosion. The composite coating takes advantage of the physical barrier of Ti 3 C 2 T x along with improving the adhesion strength of Ti 3 C 2 T x /silane coating with substrate, thereby exhibiting excellent corrosion resistance . Anti-corrosion properties are characterized by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization. Impedance at 10 −2 Hz of the composite coating increases by 1.8 orders of magnitude and the current density decreases by ∼5 fold compared to the neat silane coating . Besides, the composite coating shows a high impedance modulus after immersion test for 16 days and keeps a high protection efficiency of 98.55% after immersion test for 30 days. The corrosion resistance mechanism is that the Ti 3 C 2 T x nanosheet can avoid the microviods and extend the diffusion path way of the corrosive media. The composite coating is prepared by a simple solution-based process without tedious modification for Ti 3 C 2 T x MXene . This work not only highlights the potential application of Ti 3 C 2 T x /silane composite coating as an effective anticorrosion material, but also expands the application of Ti 3 C 2 T x MXene.
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